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Library for performing common cryptographic operations

There is a newer version: 2.2

- Create a base-64-encoded DSA signature of a file

  sign -sign -alg DSA -key path/to/dsa-priv-key.der -encoding base64 \
       -in path/to/file.txt


- Create a hex-encoded RSA signature of a file using an MD5 digest

  sign -sign -alg RSA -key path/to/dsa-priv-key.der -digest MD5 \
       -encoding base64 -in path/to/file.txt


- Verify a hex-encoded RSA signature using a PEM-encoded RSA public key
  (PEM-encoded key is determined by .pem file extension)
 
  sign -verify path/to/sig.hex -alg RSA -key path/to/rsa-pub-key.pem \
       -encoding hex -in path/to/file.txt